Calling device.



W, KAISLING.

CALLING DEVICE.

APPLICATION FILED NON/19,1915. RENEWED 1uLY21. m1.

1,262,352. Patented Apr. 9,1918

2 SHEETS-SHEET I.

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W. KAISLING.

CALLING DEVICE.

APPLICATION FILED NOV. 19. ms. RENEWED JULY 21, 1917. v

Patented Apr; 9, 1918.

2 SHEETS-SHEET 2.

2' 2755555. Jul/52723.2";

DMZ/25227515257227 WED TATE PATENT @FFEQE WILLIAM KAISLING, F CHICAGQ, HILINOIS, ASSIGNOR T0 KELLOGG SWITCHBOARD AND SUPPLY COMPANY, Q1 CHICAGG, ILLINOIS, A CORPORATION OF ILLINOIS.

Specification of Letters Patent.

CALLING DEVICE.

Application filed November 19, 1915, Serial No. 62,300. Renewed July 27, 1917. Serial No. 183,190.

To all whom it may concern:

Be it-known that 1, WILLIAM Knism vc, a citizen of the United States of Amerlca, residing in Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Calling Devices, of which the following is a specification.

My invention relates to calling devices, and has to do more particularly with calling devices such as are commonly used 111 telephone substations for controlling automatic switches which are located at the central oflice by directive impulses to extend a connection from a calling substation to a called substation through the agency of the said switches.

My invention is particularly adapted to operate in conjunction with the so-called metallic or two-wire type automatic circuits 1n which the circuit of the line is interrupted a, number of time determined by the adjustment of the calling device. The principal object of my invention is to provide a device of this sort which shall be certain and efficient in operation, simple in construction and economical to manufacture.

The many features and advantages of the transmitter structure herein described will be better understood upon referenceto the following detailed description taken in connection with the accompanying drawings, and the scope of the invention will be articularly pointed out in the appended claims.

Referring now morepartmularly to the accompanying drawing HrWl'llCll 1 llustrate the calling device in the difierent views, and

in which views like reference characters in* dicate like parts, and in which- Figure l is a face view of the calling device;

mg. 2 is 1% Fig. 8 is a right side v ew of Fig. 2;

Fig. 4- is a top view of Fig. 2;

ig. 5 is a bottom view of 2 wlth cetain p i 6 Fig. 5"

of Fig. 2;

Fig. 8 is a rear view similar to Fig. 2, but with the parts shown. off-normal;

Fig. 9 is a perspective view of the/parts comprising the motor spring chamber;

Fig. 10 is a perspective view of certain parts that cooperate with the setting mechanism;

Fig. 11 is a sectional view along the line 1111 of Fig. 5; 12 is a perspective view of one of the tenslon adjusting pins of the governor;

Fig. 13 is a perspective view of one of the governor weights; and i Fig. 14 illustrates diagrammatically a fastened to it in any suitable manner, it being preferably staked to the forward end of the shaft l. The finger hold actuating member 5 is proyided with a plurality of openings or finger holds 6 preferably ten in number. A number indicating disk 7 is placed with its indicating numerals below the actuating member 5 and rests upon the flange 2, the number of said numerals corresponding with the number of finger holds 6. The indicating disk 7 has a protective disk 8 of transparent material, such as glass, placed in front of it'so as to protect the said indicating disk. The members 7 and 8 are held in place upon the flanged portion 2 by means of a split ring 9, the ring fitting into a groove 10 cut in the lower periphery of the forwardly extending cup-shaped -mem-- her 3; the ring 9 when resting in its place in the groove 10 securely holds the members 7 and 8 in place upon the flanged portion 2. The ten openings which form the finger holds 6 are numbered 1, 2, 3, etc, to 0. 'l he calling device is adapted to transmit from 1 to 1'0 impulses, the said numerals upon the indicating disk indicating the number of impulses its corresponding finger hold is adapted to transmit through the agency of the set of impulse springs. The actuating member 5 is provided with a card 11 and a transparent protecting disk 12, the said card 11 and protective disk 12 being held in place by means of the clamping'ring 13 which is fastened to the actuating member 5 in any suitable manner as by means of screws 14 which have screw threaded engagement with the member 5. A stationary finger stop 15 is mounted upon the flanged portion 2 of the mounting plate 1 by means of screws 16. When the actuating member 5 is advanced in a clockwise direction, the advancing finger of the operator engages the stop 15 and. arrests the movement of the actuating member 5.

Referring now more particularly to the operating'mechanism, the main shaft 4 extends through a spring barrel S which incloses the motor spring 17. The rearwardly extending end of the shaft 4 is square in shape to receive the elongated cylindrical member 18 which has a square openin 18 of a size to fit the square portion of the shaft 4, thus holding the member 18 stationary against rotation in relation to the shaft 4. The cylindrical member 18 has a longitudinal slot 19 extending the length of the said member 18. The motor spring 17 is placed around the cylindrical member 18 and the end 20 of said spring 17 fits into the slot 19 in the member 18 thus securely holding the end of the said spring 17. A collar or casin member 21 is rovided, which has a flange portion 22 which sets in the countersunk orifice 23 in the bridge plate 24. The flanged portion 22 of the casing or sleeve 21 has a notch 25 in its lower edge into which the end 26 of the spring 17 rests, thus securely holding the other end of the said spring 17. The sleeve 21 is also provided with notches 27 which are adapted to be engaged by a spanner wrench to rotate the collar to give the motor spring the proper tension as will be hereinafter more fully described.

A clamping ring 28 is provided which fits over the collar 21 and serves as a clamp to hold the collar to the bridge plate 24 by means of the screws 29 which have screw in the slot 25 of the collar is rotated, due

to the rotation of the collar 21. The said spring is thus wound up until it is under proper tension, when the clamping ring 28 is again clamped down by means of the screws 29. The bottom surface of the ring 28 engaging the flanged ortion 22 of the collar 21 clamps the col ar against move ment and allows the spring to remain under proper tension. An arm 30 is provided which has a square orifice 31 which fits over the square portion of the shaft 4 and is held in place upon the shaft 4 by means of the screw 32 which has screw-threaded engagement with the shaft 4. This arm operates a set of shunt springs and also serves the purpose of a cover for the spring barrel S to retain the spring 17 in its place in the said barrel. Positioned beneath the spring barrel S is an arm 33 which is provided with a collar through which the shaft 4 extends, the said arm being fastened to the shaft 4 by means of the pin 34, which passes through a. transverse orifice in the said shaft 4. Positioned directly beneath the arm 33 and rotatably mounted upon the shaft 4 is a gear wheel 35 and a disk 36, the said disk 36 and gear wheel 35 being staked together by means of the rivets 37. The gear wheel 35 and the disk 36 as a whole are loosely mounted upon the shaft 4. The disk 36 is provided with a plurality of notches 36 which are adapted to be engaged by pawl 38, which is pivotally supported upon the arm 33 by 8 the pivot pin 33, the said pawl being held against the disk 36 by means of a spring 39. The spring 39 has one end fastened to the pin 40, which is staked to the arm 33; the other end of the spring engages the pawl 38. The function of this p'awl and disk will hereinafter be more fully described.

A gear wheel 41 is rotatably secured to the shaft 46, which is journaled at its opposite ends in the mounting plate 1 and in the bridge plate 24, the bridge plate 24 being fastened to the mounting plate 1 by means of the screws 42, 43, and 44. A pinion 45 formed integrally with the said shaft 46 meshes with the gear 35, the gear wheel 41 meshing with a pinion 47 which is preferably formed integrally with the shaft 48 of the governor mechanism Gr, which is adapted to retard the return movement of the finger hold actuating member 5 at a predetermined speed.

To retain the finger hold member 5 in its normal position against the tension ofthe motor spring 17, the pawl 38 pivoted upon the arm 33, is provided with an extension 38 which engages the pinion 45 upon the shaft 46 when the member 5 is at normal. Should the member 5 be advanced in a clockwise direction, the arm 33 moves with the shaft 4 and the member 5, and when the member a 5 is being restored in a counter clockwise direction its return movement is arrested by the extension 38 of the pawl 38 engaging against the pinion 45.

The governor mechanism Gr comprises the shaft 48 which has a pinion 47 formed integrally with it as hereinbefore mentioned, the said pinion meshing with the gear wheel 41 upon the shaft 46. A member 49 is staked to the bridge plate 24 and serves as we a bearing for the shaft 48 and also as a bearing surface for the weighted members 50 and 51. The weighted members 50 and 51 of the governor are pivotally supported on the bridge plate 52 by means of the pivot pins 53 and 54. The opposite end of the governor shaft is threaded and has screw-threaded engagement with the said bridge plate 52, thus rotatably securing the governor mechanism as a whole to the bridge .plate 24. Adjustment pins 55 and 56 are provided in conjunction with the coiled spring 57 to regulate the speed at which the governor G returns to normal, thereby governing the speed at which the calling device transmits impulses. In describing the governor adjusting pins I will describe the adjusting pin 55 only, which is provided with .a slotted head 55 so that it may be turned after it has been inserted into the circular orifice 58 of the weighted member 51. The end 55 of the pin 55 is slotted and then spread so that when the pin is in place-in the opening 58 and in a certain position, it will stay so positioned due to its frictional engagement with the inner surface of the orifice 58. A portion of the body of the pin is eccentrically disposed forming the eccentric portion 55 over which one loop of the coiled spring 57 rests. By turning the adjusting pins 55 and 56 the tension of spring 57 may be lessened or increased thereby decreasing or increasing the speed of the governor mechanism.

Now when the member 5 is operated in a clockwise direction to set the calling device to transmit a certain number of impulses, the gear 35 and disk 36 being loosely mounted upon the shaft remain stationary while the shaft 4 and arm 33 are operated in a clockwise direction, so that the pawl 38 rides over the notches of the disks 36 until the pawl rests in the desired notch 36. Upon the return movement of the member 5, the pawl 38 engages one of the notches of the disk 36 causing the gear 35 and disk 36 to be rotated with it, and through the medium of the train of gearing the motion is transmitted to the governor mechanism G. The weighted members 50 and 51 that i are pivotally mounted upon the pivot pins 53 and 54 of the bridge plate 52, which is rotated upon the return movement of the dial, are forced out by centrifugal force against the tension of the coiled spring 57 by the rotation of the dial. The forcing out of the free ends of the weighted members causes the pivoted ends of the members 50 and 51 to be forced against the member 49 and due to the engaging surfaces of the members 50 and 51 being in close proximity to the fulcrum of the weighted members 50 and 51, the weight of said members is multiplied in assisting the engaging surfaces of the weighted members to remain in frictional engagement with the periphery of the member 49 against the tension of the coiled spring 57.

Now should it be desired that the device be operated at a speed so as to transmit say 10 impulses in one and one half seconds, the adjusting pins 55 and 56 are turned until eccentric portions 55. are at their lowest point so that the loops of the coiled spring 57 rest upon the lowest point of the eccentric and in this position the spring 57 is under the least tension so that upon the return movement of the device the weighted members 50 and 51 are more easily acted upon by the centrifugal force, causing the inner engaging surfaces of the weighted members to be more firmly held in frictional engagement against the periphery of the member 49.

Now if it is desired to speed up the device the adjusting pins are turned causing the loops of the spring 57 to ride upon the eccentric until said eccentric is at its highest point and in this position the eccentric portion of the pins increases the tension of spring 57 thereby decreasing the force acting upon the members 50 and 51 so that the frictional engagement of the members 50 and 51 on the periphery of the member 49 is not as great as in the former case, thus permitting the speed of the return movement to be increased whereby a much shorter period for each impulse is obtained.

In order to operate the impulse springs of the device I preferably provide an interrupter member 60 of insulating material mounted upon the shaft 46 and held in place thereon by means of the nut 61 which has screw-threaded engagement with the threaded portion of the shaft 46. The disk 36 as hereinbefore described has a plurality of notches 36 twelve in number, but I only use ten of these notches as I only have the finger holds numbered from 1 to 10, having a space equal to two finger holds upon the member 5. When the member 5 is at normal, the pawl 38 engages a notch 36 upon the disk 36 and when the said member 5 is moved in a clockwise direction, the pawl rides upon the periphery of the disk, dropping in each notch in its advance movement. A slightly greater movement than that required to operate the impulse wheels a number of times dependent upon the number of impulses to be sent is given the member 5 due to the position of the stop 15 so that upon the return movement of the dial the pawl will drop back into the proper contacts is in. the form of an adjustable contact screw 62 which has screw threaded engagement with the lug 63 which is integral with the member 64, the member 64: being insulatingly mounted upon the plate 32 and is held in place by the screws 65. The extension 64 of the member 64: forms a terminal for the adjustable contact 62. The other contact of the impulse springs is in the form of a spring 66 which is also insulatingly mounted upon the bridge plate 24 by means of the insulated screws 65, the said spring being provided with an integrally formed portion 80 adapted to be engaged by the cam member 60. I so arrange the impulse contacts that the duration of the interruption and contact of the impulse contacts 62 and 66 may be varied, and to this end it provide the adjustable contact 62 which may be moved inwardly or outwardly in the lug 63. When the contact screw is turned so as to move spring 66 away from the cam the duration of the interruption will be decreased and when the spring 66 is moved toward the cam 60 the duration of the interruption will be increased.

Now if the actuating member 5 is rotated in a clockwise direction, the arm 33 and pawl 38 move with the shaft 4:, the said pawl riding over the periphery of the disk 36, the gear wheel 35 and disk 36 remaining stationary due to being loosely mounted on,

the shaft 3%, but on the return movement the pawl engages a notch 36 in the disk 36 corresponding to the number of impulses to be sent. The disk 36 and gear wheel 35 are then rotated in a counter-clockwise direction due to the motor spring 1? thereby transmitting power to the pinion 425 which meshes with the gear wheel 35, thus revolving the shaft 48 upon. which the cam member 60 is mounted bringing about the opening and closing of the impulse contacts 62 and 66 according to the number to be sent. The gearing ratio is such that for every tl'iirty degrees that the'gear el 35 is rotated the shaft t8 is rotated 186 degrees, so t if eight are to b and the dial l return movement of 5 the 35 w;

tarough degrees of *ota upon the arm 33 pawl to pass ow naeaesa spring 66 and an additional spring 70 which is insulatingly mounted upon the bridge plate 24 by means of the screws 65. When the calling device is at normal the arm 30 mounted upon the shaft 4 engages a louder 71 mounted upon the extension 701 of the shunt spring 70 and holds the shunt springs normally disengaged, but when the shaft of the actuating member 5 is moved 03 normal, the arm 30 moves with the shaft l and disengages the bufier 71 allowing the shunt spring contacts 66 and 70 to close and remain in such position until the arm 30 again engages rubber buffer 71 upon the completion of the return movement of member 5. The shunt springs are moved in unison with the impulse contacts due to the impulse spring 66 also performing the function of a shunt spring. The shunt springs are thus always moved during the transmission of impulses whereby a sliding motion occurs between the contacts tending to keep them clear, thus insuring a positive closure of the said shunt springs at all times.

I provide lugs 72 upon the three arms of the mounting plate 2% which form means for fastening the dial to an instrument. ln Fig. 1% l have illustrated a well-known substation with a calling device of my invention connected in circuit. l have used reference characters for indicating the parts which are the same as in the rest of the drawing, so that the cooperation of the impulse and shunt springs will be readily apparent.

T will now describe briefly the operation of the device. Let us assume that the operator wishes to effect four operations of the impulse contacts 62 and 66, that is, to transmit four impulses, the finger of the operator will be inserted into a finger hold 6 before the number 4- and the member 5 is rotated in a clockwise direction until the finger of the operator engages the stationary stop 15.

The rotation of the member 5 also causes the rotation of the main shaft r, the arm 33 and the pawl 38 and as the pawl 33 is mounted he arm in its rotation in with it, allows the said the notches of the dish. 36

carrying the pa thereby pern 't the finger of the operator is removed from the finger hold 6 of the member 5 the spring 17 restores shaft 4, arm 33 and arm 30 to normal. The pawl 38 now engages a notch bring about the rotation of the cam member 60 causing the contacts 62 and 66 to be interrupted four times to transmit the four impulses to the central otfice to operate the central office switches. Upon the return to normal of the device, the portion 38 of the pawl 38 engages a tooth in the pinion 45 thereby immediately arresting further rotation of the impulse cam, and the arm 30 again engages the buffer 71 on the spring interrupting shunt springs 66 and 70. The device is now at normal, and is again ready to be adjusted to effect the transmission of another set of impulses.

In illustrating my invention 1 have shown it operating with a certain form of substation, but I do not wish to be limited to this form as the device of my invention is adapt-' ed for other uses. Neither do I wish to be limited to the exact structure as shown as many modifications and changes may readily suggest themselves, therefore I aim to cover all such changes and modifications as come within the spirit and scope of the appended claims.

Having described my invention, what I claim as new and desire to secure by United States Letters Patent, is:

1. A calling device including an. accelerating gear train, a setting member provided with a rotatable arm secured thereto for transmitting power to the gear train, an impulse transmitting device connected to the gear train at a point between the ends thereof, and means for preventing an over-run operation of said train by applying a stopping force at said intermediate point.

2. A signaling device comprising impulse mechanism, a rotatable finger hold device provided with an arm for controlling said impulse mechanism, an accelerating gear train, a pawl secured to said arm for engaging a gear in said train, an impulse transmitting device connected at an intermediate point of said gear train, and means including said pawl for preventing an incorrect operation of said train by applying a stopping force at said intermediate point of motion.

3. A calling device including a mounting plate, an accelerating gear train supported by said plate, a rotatable setting member, a pawl rotatable with said setting member and adapted to enga e a gear in said gear train at one end of e se, a governor device connected at the other end of, said gear train, a contact maker connected at an intermediate point in said gear train via a pinion, and a tooth formed integrally with said pawl for engaging a tooth in saidpinion thereby applying a stopping force to said gear train and preventing an overrun operation thereof.

4. A calling device including impulse mechanism, a setting member provided with a rotatable arbor for controlling said impulse mechanism, a cylindrical member provided with a rectangular orifice adapted to fit over said arbor and engage a rectangular shoulder on said arbor, a slot cut in said cylindrical member, an adjustable spring containing drum surrounding said arbor and cylindrical member, a motor spring yieldingly connecting said arbor to said spring drum by having one of its ends extending into the slot in said cylindrical member and its opposite end extending into a notch in said spring drum, and means for rotatably adjusting said spring drum whereby the desired tension of said motor spring is secured.

5. A calling device including a mounting plate, impulse mechanism supported by said plate, a rotatable setting member, a pawl movable with said setting member for co operation with the impulse mechanism, an accelerating gear train included in said mechanism, an impulse maker connected at an intermediate point in said gear train, and a projecting member formed integrally with said pawl for engaging a gear connected in the train of gearing at said intermediate point to prevent an overrun operation of said device when said setting member returns to normal.

6. A device of the character described in.- cluding an accelerating gear train, a setting member connected at one end of said gear train and a governor device connected at the opposite end thereof, a contact controller connected to said gear train through the medium of a pinion, and a member movable with said setting member for engaging a tooth of said pinion to apply a stopping force to prevent an overrun operation of said gear train.

7 A calling device including an accelerating gear train, a setting member connected at one end of said train and a governor device connected at the opposite end thereof, a contact controller connected at a point intermediate the ends of said gear train through the medium of a pinion, and a member rotatable with said setting member for applying a stopping force at the point where said contact controller is connected to said gear train by engaging said pinion for preventing an overrun operation of said tram when the setting member returns to normal.

8. A calling device including a setting member provided With a rotatable arbor, a cylindrical member provided With a rectangular orifice adapted to receive a rectangular shoulder of said arbor, a spring containing drum surrounding said arbor and said cylindrical member, a coiled spring yieldingly connecting said arbor to said spring drum, a clamping ring adapted to hold said drum in its adjusted position, and 1c jneans for rotatably adjusting said drum whereby the desired tension of said coiled spring may be secured.

9. A calling device including a mounting plate, 5 setting member provided with amtatable arbor, an auxiliary mounting member secured to said first mounting member and through which said arbor extends, a recess cut in said auxiliary mounting member, a spring containing drum surrounding said arbor and provided With a flanged portion that sets into said recess, a coiled spring connecting said arbor to said spring containing drum, and a clamping ring that fits over the cylindrical portion of said drum and engages the upper :Eace of said flan e to secure said spring drum in its adjusted po- $161011.

10. A calling device including a mounting frame and a mounting member secured 80 thereto, a setting member provided With a rotatable arbor that extends through orifices in said mounting frame and said mounting member, a cylindrical member provided With a rectangular orifice adapted to fit over said arbor and engage a rectangular shoulder thereon, a notch out. in said cylindrical member, an adjustable spring containing drum surrounding said arbor and cylindrical member, a motor spring yieldw ingly connecting said arbor to said drum by having one of its ends extending into the notch in said cylindrical member and naeaeee its opposite ends extending into a notch I in said spring drum, and a clamping collar for yieldingly holding said spring drum in cylindrical portion of said drum and en' gages the upper face of said flange to secure said spring drum in its adjusted position, a pair of od-normal springs, and a member carried by said arbor for operating said springs.

12, A calling device including an integral cup-shaped flanged mounting frame, impulse mechanism lncluding an accelerating gear train supported by said frame and positioned partially Within the cup portion of said frame, a rotatable setting member positioned at the external face of the cup portion provided With a shaft extending into the cup-shaped portion and connected to the said impulse mechanism via a pawl connected to said shaft and engaging a gear in said gear train, said pawl controlling the extent of operation of said gear i'lif'tllln Signed by me at hicago in the county of Cook and State of Illinois in the presence or two Witnesses.

WILLIAM KAISLKNG, Witnesses:

G. A. Yanocrrovvsnr, B, UBnmn. 

